ICD-10 Code H47.01 – Ischemic optic neuropathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H47.01 – Ischemic optic neuropathy
What it is
H47.01 identifies ischemic optic neuropathy, a condition caused by reduced blood flow to the optic nerve. It is used when documentation specifically names ischemic optic neuropathy.
Clinical signs
Typical findings include sudden painless vision loss or visual field defect, often with optic disc swelling on examination. Clinical features vary; refer to documentation.
When to use this code
Use H47.01 when the provider documents ischemic optic neuropathy as the diagnosis, including anterior or posterior involvement if not coded elsewhere in the record. Apply it for confirmed cases, not for nonspecific visual complaints alone. Check documentation for laterality and any associated conditions.
Do not use for
Do not use this code for optic neuritis, retinal vascular occlusion, or unspecified vision loss. If the note does not clearly support ischemic optic neuropathy, check documentation.
Coding tip
Code from the provider’s exact diagnosis wording and verify whether the record specifies acute, chronic, or related eye findings.